9 Consequently those who have faith are blessed with Abraham, who had faith.[a]10 For all who rely on the works of the law are under a curse, because it is written, Everyone who does not do everything written in the book of the law is cursed.[b] (Galatians 3:9-10 CSB)

So, there is grace and there is the law. Grace came through Christ sacrifice on the cross and the law was given to the Israelites and to us in the Old Testament.

The law is a signpost to our sin and grace, through faith, is the covering of those sins.

So, is the law made void by grace? No, the law is covered by faith and grace. Both are needed so that we do not live under the curse of the law. The curse being a magnification of the law.

When faith and grace are present and the law points us to the hallmarks of sin we have a very clear pathway to follow. These things become self evident as does our path.